Added new dependencies to the Astro and npm configuration files which includes sitemap, vercel, and other packages. Removed the HSThemeAppearance script in ThemeIcon.astro and the favicon.svg file. Made minor adjustments to the class attributes of some components in HeroSection.astro for styling purposes. These changes aim to enhance website performance and user experience. Furthermore, the addition of the sitemap package will help improve website SEO.
Introduces a new component 'ThemeIcon' to enable a smooth switch between light and dark themes based on user preference. This improvement includes a drop-down menu for the users to select their preferred mode and also defines theme-related functionalities inside an object called 'HSThemeAppearance'. Further, it incorporates respective event listeners to effectively handle theme change events.
